late word from two federal law enforcement officials that there is an arrest in connection, as erin said, with the poison letters sent to the u.s. president and the u.s. senator. new developments as well in the bombing case to tell you about. and obviously, it has been a roller coaster day for people here, emotionally and in terms of the facts of the story, it is not over yet. a short time ago, the fbi, again, postponed a news briefing that was originally pushed back from the 5:00 hour. it was supposed to be then at the top of the 8:00 hour. we don't know why this has been pushed back. we hope to learn more throughout the hour. >>> first, though, we want to check in with joe johns, on the deadly poison letter arrest. joe, you have some news on the arrest. what are you hearing, what is the latest? >> reporter: anderson, this is an individual from tupelo, mississippi, we're told, the home state of senator roger wicker. actually, his hometown, as well. he's one of the people who got one of the mailings. we know of two suspicious letters, a lot of confusion at the united states capitol today